Mudfoot: It sounds like you've got the same way to Phoenix that I was mentioning. The rocks, if any, are right as you drop onto the North face from the trail off the T-Bar. They're usually just around one of the drop in slots, but with some inspection you can usually find a relatively clean way in. I actually don't mind the rocks as much as the wave moguls right there. I usually just try to drop down off the worn entrance line as soon as I can. Unfortunately I don't know if there's any amount of snow that would do away with this completely. I don't recall ever having a rock issue after getting past the first ten feet or so. Then it's smooth sailing to Hawk's Nest, then over through the gate and the short traverse to Phoenix (which has also been rock free for me).
I've only gone into the top of Spellbound once. When we exited the hike-in trail, I went straight up to the edge and said "Holy Cr@p! Do we have to go down here?" It was really nasty, very steep and big rocks. Here's a picture of my two sons just below the rock band at the top of Spellbound that I thought we had to ski to get into the bowl:
Fortunately, we went over to the skier's far left. It was definitely boney, but not too difficult to cross in slowly, picking a careful line, one turn to get out, and then onto the main bowl. Once in the bowl it was very nice all the way.
Here's a shot looking back up at Spellbound from the bottom. You can see the same rock band at the very top of the bowl. You can't really see where we entered on the far right:
Finally, just for one more mouth-watering shot, here's one looking down toward Phoenix from the same vantage point:
Matt: I'm going to be there for the last half of Feb, but am leaving on the 27th. In past years the resort has offered free North Face tours every day. If you don't have someone you can trust to take you around, that would be a good way to get started (or a private lesson $$$).